LW 72.5KV - 145KV Outdoor GCB

brief introduction

ROCKWILL developed the LW□-72.5/126/145 series of outdoor SF6 gas circuit breaker using modern processing technology and computer-aided design techniques, combined with the latest generation of spring mechanisms and the advantages of a permanent institution/housing. Its pursuit of high reliability, easy to maintain design concepts that create a generation of superior product, is the best and most reliable solution for the electric power system.
ROCKWILL all series switches meet the following criteria: ANSI/IEEE C37.60/IEC 62271-100( GB1984-2003 China standard), GBT11022-1999 China Standard, IEC 60255-11, IEC 60255-21-1 Class I, IEC 60255-21-2 Class I, IEC 60255-21-3 Class I, IEC 60255-22-1 Class III, IEC 60255-22-2 Class IV, IEC 60255-22-3 Class III, IEC 60255-22-4 Class IV.

designed to switch

No

Item

Unit

Parameter

1.

Rated Voltage

KV

72.5

126

145

2.

Rated Frequency

Hz

50/60

3.

Rated Current

A

1600, .... 4000

4.

1min Power Frequency Withstand Voltage

KV

140

230

265

5.

Lighting impulse Withstand Voltage

KV

325

550

650

6.

10min Power Frequency Voltage at Zero Gas Pressure

KV

55

95

109

7.

Rated Short Circuit Breaking Current(Peak)

KA

80...100

80...100

80...100

8.

Rated Short Breaking Current

KA

31.5,.40

31.5,.40

31.5,.40

9.

Rated Out-of-Phase Breaking Current

KA

10

10

10

10.

Rated Cable(line) Charging Breaking Current

A

10

31.5

50

11.

Rated Gas Pressure

Mpa

0.4

0.5

0.5

12.

Main Loop Resistence

μΩ

≤40

≤45

≤45

13.

Operation Sequence

O-0.3s-CO-180s-CO

14.

SF6 Gas Leakage Rate (Per Year)

%

≤1

15.

Moisture Content (V/V)

ppm

≤150

16.

Creepage Distance

Across The Open Contacts

mm

2300

3950

≤3950

To Earth

mm

2300

3950

≤3950

17.

Mechanical Life

Times

10,000

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